So guys bit of a back story

Got with this girl multiple times over a year ago, we messaged over a semester break. After break I asked her out for drinks only to be told that ‘she would love to but she has a boyfriend’ after this I hard next. At this point I proceed to start lifting, improving my game (getting multiple plates) and massively increasing my SMV value.

After 8 months of no messaging/contact (new college year) She is still going out with her boyfriend (who knows who I am) however she has drunk messaged me multiple times mid night out trying to find me/wanting me to meet her in a club (small college campus) of which I have pretty much ignored (as I was gaming other people) I have since messaged her making fun at the drunken messages of which she claims were ‘innocent’ + me making fun out of her (making it clear I’m not her friend). Following this she has continued to message me + drunk message me.

How would you rationalise her behaviour? + what do you think I should do going forward (if I wanted to make her my plate since she can’t be trusted in a LTR) baring in mind I will be bumping into this girl a lot. My thinking is that she is doing this because she misses my attention/validation that I gave her before and wants me to orbiter her?